Premature Failure of Deep Grooved Ball Bearing for Automobiles : Part 2 - Critical Dent Size

자동차용 깊은홈 볼베어링의 조기파손 : 2보 - 임계압흔의 크기

In this paper, the dent printing phenomena and critical dent size which lead to premature failure of deep grooved ball bearing for automobiles are presented. The results of newly assembled test bearings showed that the ball dent size strongly affect the bearing life and inner ring raceways were the major failed parts in spite of using the dented balls. The dent printing phenomena are a root cause of premature failure, which was not reported until now. And there exist the critical ball dent size for given rolling bearings and operating conditions. So, the initial condition of tribologically mating parts should be treated as important as the failed body itself.